Automatic weighing-machine.



J. NIELD.

AUTOMATIC WEIGHING MACHINE.

APPLIGATION FILED APR. 6, 1911.

1,014,717, PatentedJan. 16, 1912.

8 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH 120.. WASHINGTON. D. c.

' J. NIELD.

AUTOMATIC WEIGHING MACHINE. APPLICATION FILED APLB, I911.

Patented Jan. 16, 1912.

8 SHEETS-SHEET 2.

COLUMBIA PLANOORAPH C04, WASHINGTON, g. c.

J. NIELD.

AUTOMATIC WBIGHING MACHINE.

nruonmn FILED APB..6, 1911.

Patented J an. 16, 1912.

a SHEEITSSEEBT a.

COLUMBIA PLANOGRAIH CO.,WASHINGTON, u. c.

J. NIELD.

AUTOMATIC WEIGHIN G MACHINE.

APPLICATION FILED AIRJS, 1911.

8 SHEETSSHEBT 4.

Patented Jan. 16, 1912.

J. NIELD.

AUTOMATIC WEIGHING MACHINE.

APPLICATION FILED APR.6, 1911.

1 14,717. Patented Jan.16,1912.

va SEEET$-$HEBT 5.

I COLUMBIA PLANOGRAPHICOU WASHINGTON, D. c.

J. NIELD.

AUTOMATIC WEIGHING MACHINE.

APPLICATION FILED APR. 6, 1911.

1,014,717. Patented Jan. 16,1912.

8 SHEETS-SHEET 6.

' IIIIII 1 I I I I I I I I coLuMmA PLANOGRAPH cOuwAsHlNflTflN, D.c.

J. NIELD. AUTOMATIC WBIGHING MACHINE.

APPLICATION FILED APR. 6; 1911.

1,014,717. Patented Jan. 16,1912.

8 SHEETSSHEET 7. v

J. NIELD; AUTOMATIC WEIGHING MACHINE.

APPLICATION FILED APR. 6, 1911.

1,014,717. Patented Jan. 16,1912.

'8 SHEETS-SHEET 8.

fi fiteffef UNITED STATES PATENT OFFICE.

JOSIAH NIELD, OF NORTH MILWAUKEE, WISCONSIN, ASSIGNOR 'IO AVERY SCALECOM- PANY, OF NORTH MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

AUTOMATIC WEIGHING-MACHINE.

Specification of Letters Patent.

Patented Jan. 16,1912.

Application filed April 6, 1911. Serial No. 619,214.

To all whom it may concern:

Be it known that I, JOSIAH NIELD, a subject of the King of GreatBritain, residing in North Milwaukee, in the county of Milwaukee andState of WVisconsin, have invented new and useful Improvements inAutomatic lVeighing-Machines, of which the following is a description,reference being had to the accompanying drawings, which are a part ofthis specification.

This invention relates to improvements in automatic weighing machinesand more particularly to weighing machines which are adapted to weighmaterial of a granular or pulverous character and divide it into smallportions for filling packages.

It is one of the objects of this invention to provide a weighing machinewhich will automatically and alternately feed material to the weighinghoppers and accurately weigh the material and discharge the sameindependently so it may be placed in packages adapted to contain acertain predetermined amount of material.

A further object of the invention is to provide a weighing machine whichis adapted to automatically feed, weigh and separate material at a fastrate of speed for use in filling packages usually containing a pound ofmaterial.

A further object of the invention is to provide a weighing machine witha main or maximum feed and with an auxiliary or minimum feed in order toobtain great rapidity and accuracy in the feed and in the weighing ofthe material.

A further object of the invention is to provide a weighing machinehaving adjustable means for limiting the maximum amount of materialwhich is fed to the scale hopper previously to its discharge from thefeeding means to the weighing hopper.

A further object of the invention is to provide means for automaticallyemptying the scale hoppers as soon as the-material has been weighed.

A further object of the invention is to provide a double acting weighingmachine having two weighing hoppers which alternately receive and weighand discharge the material to form a continuously working machine andthus expedite the operation of weighing the material.

A further object of the invention is to weighing machine and its partsand combinations as set forth in the claims, and all equivalentsthereof.

In the accompanying drawings in which the same reference charactersindicate the same parts in the several views, Figure 1 is a side view ofthe improved automatic weighing machine and a fragment of a hopper intowhich the weighed material may be discharged; Fig. 2 is a front viewthereof, a part broken away to show other parts in the rear thereof;Fig. 3 is a transverse sectional view thereof, taken on line 33 of Fig.2; Fig. 4 is a transverse sectional view thereof taken on line 44 ofFig. 2; Fig. 5 is a transverse sectional. view thereof taken on line 55of Fig. 2; Fig. 6 is a vertical sectional View thereof taken on line 66of Fig. 2; Fig. 7 is a vertical sectional view thereof taken on line 7-7of Fig. 1; and Fig. 8 is a vertical sectional view of the weighingmachine taken on line 88 of Fig. 2.

Referring to the drawings the numeral 12 indicates the supporting frameof the weighing machine and 13 the receiving hopper positionedtherebeneath. This frame consists of side uprights 14, a top connectingportion 15, a bottom connecting portion 16 and a medial upright 17. Thetop connecting portion of the frame is formed with depending chargeholding hoppers 18 which have discharge bottom openings 19 provided forthe discharge ofn'iaterial therethrough. Rectangular boxes or covers 20extending over the hoppers serve to increase the height and the capacityof the hoppers; Integral supply hoppers 21 positioned above the boxesand supported thereon by means of the standards 22 are provided withfixed feed tubes 23 which extend into openings provided in the tops ofthe boxes or covers 20. Adjustable feed tubes 24 telescoping the lowerends of the fixed feed tubes are ad'- justably suspended therefrom bymeans of the thumb screws 25 to provide for feeding the charging hopperswith amounts of material slightly less in quantity than the amount forwhich the machine is set to weigh at each weighing. The supply hoppersare provided with supplemental or dribble feed chutes 26 which are incommunication with independent hopper compartments 27 and hopperopenings 28 provided in the charge holding hoppers 18. Scale hoppers 29provided with supplementalfeed compartments 30 and positioned beneaththe charge holding hoppers 18 are adapted to independently receive andhold the material discharged from the hoppers until the required amounthas been discharged to balance the weight for which the machine has beenadjusted. The scale hoppers are independently and pivotally supported onthe inner ends of scale beams 31 which are mounted on the fulcrums 32 ofthe main frame. The outer ends of the beams are provided with weightpans 33 upon which weights 34 are placed to counter-balance the desiredamounts of material. The lower open ends of the adjustable feed tubesare closed by means of feed tube valves 35 which are adjustably carriedby the vertical rock shafts 36. These rock shafts 36 extend through andare journaled in the holding hoppers 18 and the boxes or covers 20. Theupper ends of the rock shafts carry coiled springs 37 the upper ends ofwhich extend through openings in the shafts and their lower ends areconnected to stud pins 38 projecting upwardly from the boxes or covers20. These springs normally hold the feed tube valves in closed positionand cam arms 39 carried by the lower ends of the rock shafts andpositioned to be alternately engaged by the upper cam 40 are adapted toalternately swing the valves to open position. The cam 40 is carried bya vertical cam shaft 41 journaled medially on the main frame. A shorthorizontal shaft 42 journaled in a bracket 43 and provided with a bevelpinion 44 on its inner end which meshes with a bevel gear 45 carried bythe upper end of the vertical cam shaft 41 is adapted to constantlyrotate the cam shaft while the machine is in operation. horizontal shaftis provided with a pulley 46 loosely mounted thereon which is adapted tobe connected to the shaft by means of the clutch 47 slidably mounted onsaid shaft. The pulley is rotated by a belted connection with a sourceof motion (not shown). In order to provide for the necessary adjustmentof the feed tube valves when the feed tubes are adjusted the valves areloosely and longitudinally slidably mounted on the rock The shaftsbetween the ears of brackets 48 which are carried by the lower ends ofthe feed tubes. The rock shafts have flattened or slabbed portions 49and the valve openings through which the rock shafts pass arecorrespondingly shaped to provide for the turning of the valves when theshafts are rocked.

The lower edges of the holding hoppers surrounding the dischargeopenings thereof are provided with a plurality of bristle tufts 5Oconstituting a brush edge for the holding hopper valves 51 and thesupplemental valves 52 to rub on and form a material tight closure. Theholding hopper valves 51 extend immediately beneath the holding hopperopenings and are pivotally connected to and supported by the valvebrackets 53 depending from the top connecting portion of the frame. Thesupplemental valves 52 which are also pivotally connected to thedepending brackets are in the form of bell cranks and their short arms54 are engaged by fiat springs 55 extending from the brackets tonormally hold the inner edges of the supplemental valves against theouter edges of the holding hopper valves. Spring retrieved plunger rods56 slidably mounted in the brackets 53 have pins 54 projecting upwardlyfrom their outer ends which extend through elongated slots provided inthe holding hopper valves so that when said plunger rods are pushedoutwardly both the hopper valves and the supplementalvalves will beswung from beneath the respective discharge openings which they control.The spring retrieved plunger rods are provided with collars 57 whichstrike against depending arms 58 of the brackets to limit the inwardmovement of the plunger rods. The inner ends of these plunger rods areprovided with depending tubular portions 59 through which loosely extendcam pins 60 which are adapted to be raised to a position to bealternately engaged by a plunger rod cam 61 carried by the cam shaft 41.The cam pins are provided with heads on both ends to prevent theirseparation from the tubular members and are raised to cam engagingpositions by the projecting ends 62 of the scale beam 31 when the scalehoppers are in proper position to be filled.

When the hopper valves and the supplemental valves are moved to openposition the hopper valves will swing to a position to close thesupplemental feed chutes and prevent the discharge of material therefromwhile the hopper discharge openings are discharging material. In movingthe valves to open position the outer ends of the short arms 54 of thesupplemental valves will be swung forwardly and engage the rollers 63 ofthe bell crank triggers 64. The bell crank triggers are pivoted to theside uprights 14 and are normally positioned so that the rollers 63thereof are in the path of movement of the arms 54 and when the arms 54:are swung outwardly the said rollers fill be momentarily forced upwardlywhile the arms 54 pass thereunder. When the arms have passed under therollers the said rollers will then swing downward to their normalposition and will hold the supplemental valve arm in open position untilreleased by the bell crank trigger 64. lVhen the plunger rod cam 61rotates out of engagement with the particular plunger rod pin justengaged the spring surrounding the rod will react to slide the rod andswing the hopper valve to its normal closed position and in moving toits closed position will pass from beneath the supplemental chuteopening and permit the discharge of material therefrom. As theapproximate amount of material was discharged from the holding hopperthe supplemental feed chute will quickly discharge the necessary amountof material to overbalance the scale weight and cause the scale hopperto descend to its discharging position. Each scale beam 31 is providedwith an outwardly projecting pin 65 which is positioned to engage thelower hook arm 66 of the bell crank trigger when said trigger is engagedby the supplemental valve arm 54. When the trigger is thus engaged thelower hook arm 66 thereof will be swung rearwardly to a position in thepath of movement of the projecting pin 65. The weight of each triggerarm carrying the roller is sufficient to swing the lower hook armrearwardly to a position in the path of movement of the pin 65 and whilethe trigger is holding the supplemental valve in open position the lowerhook end of said trigger arm will remain in said path of movement. Whenthe scale hopper starts to descend to its discharging position theprojecting pin 65 will engage the hook arm of the trigger 64 and willswing said trigger and release the supplemental valve which will beswung to a closed position by the spring 55.

The depending tubular portions 59 of the plunger rods 56 are providedwith angular projections 59 which are positioned toextend beneath thescale beams when the holding hopper valves are in open position toprevent the said beams and the scale hoppers from descending to adischarging position while the said holding hopper valves are in openposition.

The lower end of the cam shaft ell carries a cam or notched wheel 67 andreleasing levers 68 fulcrumed on a portion of the medial upright frameare positioned on opposite sides of the notched wheel and haveantifriction rollers 69 journaled on their outer ends which ride on theperiphery of the notched wheel. A coiled spring 7 0 connected to eachreleasing lever serves to hold the lever rollers yieldingly against theperiphery of the notched wheel and causes the rollers to alternatelyride into the notch or recess when the notched portion is rotated intoregister therewith. The ends of the releasing levers opposite to theends carrying the antifriction rollers are provided with angularprojections 71 which are adapted to engage the upper edges of scalehopper latches 72 when the scale hoppers are in discharging positions.These latches are medially pivotally connected to the sides of the scalehoppers and have lower hook ends 73 which hook beneath the scale hopperdoors 74 to hold said doors in closed position. The latches are providedwith recessed portions 7 which are in register wit-h the angularprojections of the releasing levers when the scale hoppers are inpositions other than discharging positions to permit the play of thelevers when moved by the notched wheel.

The scale hopper doors are provided with projecting arms 75 havingcounterweights 76 adjustably connected thereto which slightlyoverbalance the doors and cause them to automatically swing to closedposition and into latching engagement with the hooked ends of thelatches. lVhen each scale hopper is charged with material and hasdescended to a discharging position the latch will be released fromengagement with the door by the releasing lever and the weight ofmaterial resting on the door will overbalance the counterweight and thematerial will be discharged and as soon as discharged the counterweightwill again cause the door to close and latch.

Horizontal links 77 pivotally connected to the medial upright and hookedinto eyes 78 provided on the scale hoppers serve to prevent the saidhoppers from swinging and at the same time do not interfere with theweighing operation.

In order to accurately balance the beam and hopper with relation toother parts of the scale compensating weights 77 and 7 8 are providedwhich are adjustably carried by levers 7 9 and respectively and arepositioned to engage opposite ends of the scale beams. The levers 79 arepivotally connected at one end to the uprights 14: at points in verticalalinement with the fulcrums and the opposite ends of the levers rest ontop of the projecting pins 65 so that the weights may be adjusted onsaid levers to diminish or increase the weight on the outer ends of thebeams. The compensating levers 80 are medially pivotally connected 'tothe uprights 14 and have the weights 7 8 adjustably connected to theirlonger ends and these ends are adapted to rest upon stops 81 projectingfrom the uprights when the scale hoppers are in their dischargingposit-ions. These projections also extend beneath the weight pan ends ofthe scale beam to limit the downward swing of said ends. The shorterends of the levers 80 extend beneath pins 82 projecting from the scalebeams and serve to initially start the move ment of the beams to adischarging position and also counterbalance the weights 77. Stop lugs83 projecting from the sides of the uprights and extending beneath thescale beams limit the downward movement of the hopper supporting ends ofthe scale beams.

In the operation of the automatic weighing machine the material to beweighed is placed in the supply hopper and the clutch is pushed intoengagement with the complementary clutch face of the pulley to start therotation of the cam shaft. The upper cam of the shaft will alternatelyengage the cam arms and swing the feed tube valves to open position andthe spring controlled rock shafts will retrieve said valves whendisengaged by the cams. The material will drop into the charge holdinghoppers and the covers thereof and fill said hoppers and covers withmaterial to an extent controlled by the adjustable feed tubes. If it isdesired to weigh and separate the material into pound quantities theadjustable tubes are adjusted to permit an amount of material slightlyless than one pound to enter each holding hopper. The further rotationof the cam shaft will cause the plunger rod cam shaft to engage theplunger rod of the scale beam which is in its uppermost position andforce the plunger rod outwardly and the holding hopper valve and thesupplemental valve which are connected thereto will be swung to openpositions. The holding hopper valve in swinging to open position willcover the discharge opening of the independent hopper compartment andprevent the discharge of material therefrom. The material in the hopperabove this holding hopper valve will immediately be discharged into thescale hopper therebeneath and when the cam rotates out of engagementwith the plunger rod the coiled spring surrounding said rod will forceit and the holding hopper valve to closed position. Then thesupplemental valve was swung to open position by the holding hoppervalve the outer bell crank arm of said valve swung beneath and raisedthe antifriction roller of the bell crank trigger and when on theopposite side of said roller the roller swung downwardly by gravity to aposition in front of the arm and held said arm and valve forming partthereof in open position. In this position the lower hook arm of thebell crank trigger is in the path of movement of the outwardlyprojecting pin of the scale beam. As soon as the holding hopper valvehas swung to closed position the material in the inclependent holdinghopper compartment will mental feed compartment of the scale hopper andthis material will quickly charge the hopper with the required weightand cause it to descend to its discharging'position. In descending theprojecting pin will engage the bell crank trigger and swing theantifriction roller thereof out of engagement with the arm of thesupplemental valve and said valve will be swung to its closed positionby the flat bracket spring. When the scale hopper has reached itsdischarging position the scale hopper latch of this particular hopperwill be in the path of movement of the releasing lever on the same sideof the machine and when the antifriction roller of said lever enters therecess or notch of the notched wheel the said lever will trip the latchfrom the hopper door and the weight of material Within the hopper willopen the door and be discharged therefrom. As soon as discharged thecounterweight of said door will close and latch said door and the scaleweight will elevate the hopper to charging position again and the sameoperation will be repeated.

The hoppers are adapted to be alternately filled and alternately emptiedand the weighing operation proceeds in a continuous manner. Theprovision of the cam pins pro vides for stopping the charging of thescale hoppers except when in charging position and the compensatingweights provide for accurately adjusting the scale beam to compensatefor the material in suspension, or in other words, the material which isdropping after the valves are closed and while the scale hoppers aredescending.

From the foregoing description it will be seen that the weighing machineis automatic and continuous in its operations and is provided with meansfor accurately adjusting the parts.

It is to be understood that this invention not limited to any specificform or arrangement of parts except in so far as such limitations arespecified in the claims.

What I claim as my invention is:

1. An automatic weighing machine, comprising a scale beam provided withweights at one end and a scale hopper at the other end having adischarge door in its lower portion, a holding hopper located above thescale hopper and provided with a discharge opening, a valve controllingsaid opening, a feed chute located above the holding hopper and providedwith a valve closing its lower open end, a driven shaft, and mechanismsactuated by the shaft for controlling the opening and closing of thevalves and the discharge door.

2. An automatic weighing machine, comprising a scale beam provided withweights at one end and a scale hopper at the other end having adischarge door in its lower portion, a holding hopper located above thescale hopper and provided with a discharge opening, a valve controllingsaid opening, a feed chute located above and extending into the holdinghopper and provided with a valve closing its lower open end, asupplemental feed chute located to discharge material into the scalehopper and provided with a supplemental valve controlling its dischargeopening, a driven shaft, and mechanisms actuated by the shaft forcontrolling the opening and closing of the valves and the dischargedoor.

3. An automatic weighing machine, comprising scale beams provided withweights at one end and scale hoppers at their other ends havingdischarge doors in their lower portions, holding hoppers located abovethe respective scale hoppers and provided with discharge openings,valves controlling said openings, feed chutes located above therespective holding hoppers and provided with valves closing their loweropen ends, a driven shaft, and mechanisms actuated by the shaft foralternately controlling the opening and closing of the valves and thedischarge doors of the respective hoppers and chutes.

4:. An automatic weighing machine, comprising scale beams provided withweights at one end and scale hoppers at their other ends havingdischarge doors in their lower portions, holding hoppers located abovethe respective scale hoppers and provided with discharge openings,valves controllin said openings, feed chutes located above t erespective holding hoppers and provided with valves closing their loweropen ends, supplemental feed chutes located to discharge material intothe scale hoppers and provided with supplemental valves controllingtheir discharge openings, a driven shaft, and mechanisms actuated by theshaft for alternately controlling the opening and closing of the valvesand the discharge doors of the respective hoppers and chutes.

5. An automatic weighing machine, comprising a main frame having a scalebeam fulcrumed thereon which is provided with weights at one end andwith a scale hopper at its other end, a discharge door forming the lowerpart of the hopper, a holding hopper located above the scale hopper andprovided with a discharge opening and with a supplemental materialholding compartment having a discharge opening, a valve closing saidhopper discharge opening, a valve closing the supplemental compartmentdischarge opening and positioned in the path of movement of the hoppervalve toward its open position, means for moving the hopper valve andthe supplemental valve to open positions, means for holding thesupplemental valve in open position after the hopper valve has returnedto its closed position, a feed chute located above the holding hopperand having a discharge opening in its lower end,

a valve normally closing said discharge their other ends, a dischargedoor forming the lower part of each hopper, holding hoppers locatedabove the scale hoppers and provided with discharge openings and withsupplemental material holding compartments having discharge openings,valves closing the supplemental compartment discharge openings andpositioned within the paths of movement of the hopper valves toward openposition, means for alternately moving the hopper valves and thesupplemental valve of each scale and holding hopper to open positions,means for alternately holding the supplemental valves in open positionafter the adjacent hopper valve has returned to its closed position, afeed chute located above each holding hopper and provided with dischargeopenings in their lower ends, supplement-a1 valves normally closing saiddischarge openings, a shaft journaled on the frame, mechanisms actuatedby the shaft for alternately moving the valves of the holding hoppersand the feed chutes to open positions and for alternately controllingthe opening of the doors of the scale hoppers, means for alternatelyreleasing the supplemental valves from open positions when the scalehoppers have received their predetermined amounts of material, and meansfor closing the doors of the scale hoppers after the material has beendischarged therefrom.

7. An automatic weighing machine, comprising a main frame having scalebeams fulcrumed thereon which are provided with weights at one end andwith scale hoppers at their other ends, each hopper being provided witha discharge opening and a hinged door closing the opening, said doorsprovided with means for normally holding them in closed positions andhaving a latched engagement with the hoppers, a holding tion thesupplemental valve adjacent thereto, said hopper valves positioned toclose the discharge openings of the feed chutes when alternately swungto open positions, a lever for holding each supplemental valve in openposition after the adjacent hopper valve has returned to its closedposition, slidable members for alternately moving the holding hoppervalves to open positions, a shaft journaled on the frame and providedwith a plurality of cams, mechanisms actuated by the cams for engagingthe holding hopper and the feed chute valves to move them to openposition and for engaging the latched connections between the scalehoppers and their doors to permit said doors to open, and means providedfor moving the levers to release the supplemental valves and permit themto swing to closed position.

8. An automatic weighing machine, comprising a main frame having scalebeams fulcrumed thereon which are provided with weights at one end andwith scale hoppers at their other ends, each hopper being provided witha discharge opening and a hinged door closing the opening, said doorsprovided with means for normally holding them in closed positions andhaving a latched engagement with the hoppers, a holding hopper locatedabove each scale hopper and provided with a discharge opening, a feedchute located above each scale hopper and provided with a dischargeopening closed by a supplemental valve, a valve closing each holdinghopper discharge opening and positioned to engage and move to openposition the supplemental valve adjacent thereto, said hopper valvespositioned to close the discharge openings of the feed chutes whenalternately swung to open positions, a lever for holding eachsupplemental valve in open position after the adjacent hopper valve hasreturned to its closed position, spring retrieved slidable membershaving a connection with the holding hopper valves for moving saidvalves to open position, slidable cam pins carried by said members andpositioned to be engaged by the weight beams, a shaft journaled on theframe and provided with a plurality of cams, one of said cams positionedto alternately engage the cam pins when said pins are engaged by thescale beams, mechanisms actuated by the other cams for engaging the feedchute valves to move them to open positions and for engaging the latchedconnections between the scale hoppers and their doors to permit doors toswing to open positions, and means provided for moving the levers torelease the supplemental valves and permit them to swing to closedpositions.

An automatic weighing machine, comprlsing a main frame having scalebeams fulcrumed thereon which are provided with welghts at one end andwith scale hoppers at their other ends, each hopper being provided witha discharge opening and a hinged door closing the opening, said doorsprovided with projecting arms carrying weights adjustable thereon fornormally closing the doors, latches provided for locking the doors inclosed positions, a holding hopper located above each scale hopper andprovided with a discharge opening and with a supplemental feedcompartment also provided with a discharge opening, an adjustable feedchute located above each holding hopper and provided with a dischargeopening, pivoted valves closing the holding hopper openings, springretrieved slidable bolts connected to the holding hopper valves andprovided with tubular portions, cam pins slidably extending through thetubular portions, supplemental valves closing the discharge openings ofthe supplemental feed compartment and positioned in the paths ofmovements of the holding hopper valves and adapted to be moved therebyto open positions, bell crank levers for engaging said supplementalvalves and to hold them in open positions after the holding hoppervalves have been retrieved, spring retrieved valves closing thedischarge openings of the adjustable feed chutes, a vertically extendingcam shaft journaled on the main frame, a cam provided on the shaft forengaging the cam pins when they are moved in the path of movements ofthe cam by the scale beams, a cam carried on the upper portion of theshaft for swinging the feed chute valves to open positions, a cam wheelcarried by the lower end of the shaft, spring retrieved releasing leversmounted on the frame and positioned on opposite sides of the cam wheel,said levers adapted to bear on the cam and to engage the latches of thescale hopper, and projections provided on the scale beams for engagingthe bell crank levers to release the supplemental valves and permit themto swing to closed positions.

10. An automatic weighing machine, comprising a main frame having scalebeams fulcrumed thereon which are provided with weights at one end andwith scale hoppers at their other ends, each hopper being provided witha discharge opening and a hinged door closing the opening, said doorsprovided with projecting arms carrying weights adjustable thereon fornormally closing the doors, latches provided for locking the doors inclosed positions, a holding hopper located above each scale hopper andprovided with a discharge opening and with a supplemental feedcompartment also provided with a discharge opening, an adjustable feedchute located above each holding hopper and pro vided with a dischargeopening, pivoted valves closing the holding hopper openings, springretrieved slidable bolts connected to the holding hopper valves andprovided with.

tubular portions, cam pins slidably extending through the tubularportions, supplemental valves closing the discharge openings of thesupplemental feed compartments and positioned in the paths of movementsof the holding. hopper valves and adapted to be moved thereby to openpositions, bell crank levers for engaging said supplemental valves andto hold them in open positions after the holding hopper valves have beenretrieved, spring retrieved rock shafts journaled on the frame, valvescarried by said rock shafts for closing the discharge openings of theadjustable feed chutes, cam arms carried by said rock shafts, avertically ex tending cam shaft journaled on the frame, a cam carried bythe cam shaft for engaging the cam pins and moving the plunger rods whenthe cam pins are moved in the paths of movement of the cam, a camcarried by the upper portion of the cam shaft for engaging the cam arms,a cam wheel carried by the lower portion of the cam shaft, springretrieved releasing levers mounted on the frame and positioned onopposite sides of the cam wheel, said levers adapted to bear on the camand to engage the latches of the scale hopper, and projections providedon the scale beams for engaging the bell crank levers to release thesupplemental valves and permit them to swing to closed posit-ions.

11. An automatic weighing machine, comprising a main frame having scalebeams fulcrumed thereon which are provided with weights at one end andwith scale hoppers at their other ends, each hopper being provided witha discharge opening and ahinged door closing the opening, said doorsprovided with projecting arms carrying weights adjustable thereon fornormally closing the doors, latches provided for locking the doors inclosed positions, a holding hopper located above each scale hopper andprovided with a discharge opening and with a supplemental feedcompartment also provided with a discharge opening, an adjustable feedchute located above each holding hopper and provided with a dischargeopening, pivoted valves closing the holding hopper openings, springretrieved slidable bolts connected to the holding hopper valves andprovided with tubular portions, cam pins slidably eX- tending throughthe tubular portions, supplemental valves closing the discharge openingsof the supplemental feed compartment and positioned in the paths of movements of the holding hopper valves and adapted to be moved thereby toopen positions, bell crank levers for engaging said supplemental valvesand to hold them in open positions after the holding hopper valves havebeen retrieved, spring retrieved rock shafts j ournaled on the frame,valves carried by said rock shafts for closing the discharge openings ofthe adjustable feed chutes, cam arms carried by said rock shafts, avertlcally extending cam shaft journaled on the frame, a cam carried bythe cam shaft for engaging the cam pins and moving 'the plunger rodswhen the cam pins are moved in the paths of movement of the cam, a camcarried by the upper portion of the cam shaft for engaging the cam arms,a cam wheel carried by the lower portion of the cam shaft, springretrieved releasing levers mounted on the frame and positioned onopposite sides of the cam wheel, said levers adapted to bear on the camand to engage the latches of the scale hoppers, compensating leversprovided with weights adj ustably connected thereto for engaging thescale beams, and projections provided on the scale beams for engagingthe bell crank levers to release the supplemental valves and permit themto swing to closed positions.

12. An automatic weighing machine, comprising a main frame having scalebeams fulcrumed thereon which are provided with weights at one end andwith scale hoppers at their other ends, each hopper being provided witha discharge opening and ahinged door closing the opening, said doorsprovided with projecting arms carrying weights adjustable thereon fornormally closing the doors, latches provided for locking the doors inclosed positions, a holding hopper located above each scale hopper andprovided with a discharge opening and with a supplemental feedcompartment also provided with a discharge opening, an adjustable feedchute located above each holding hopper and provided with a dischargeopening, pivoted valves closing the holding hopper openings, springretrieved slidable bolts connected to the holding hopper valves andprovided with tubular portions, cam pins slidably extending through thetubular portions, supplemental valves closing the discharge openings ofthe supplemental feed compartment and positioned in the paths ofmovements of the holding hopper valves and adapted to be moved therebyto open positions, bell crank levers for engaging said supplementalvalves and to hold them in open positions after the holding hoppervalves have been retrieved, spring retrieved valves closing thedischarge openings of the adjustable feed chutes, a vertically extendingcam shaft j ournaled on the main frame, a horizontal shaft journaled onthe frame and having a geared connection with the cam shaft, a wheelloosely journaled on the horizontal shaft and provided with a clutchface, a slidable clutch member splined to the horizontal shaft andadapted to be moved into engagement with the clutch face of the wheel, acam provided on the shaft for engaging the cam pins when they are movedin the path of movements of the cam by the scale beams, a cam carried onthe up- ,1 per portion of the shaft for swinging the feed chute valvesto open positions, a cam wheel carried by the lower end of the shaft,spring retrieved releasing levers mounted on the frame and positioned onopposite sides of the cam wheel, said levers adapted to bear on the camand to engage the latches of the scale hopper, and projections providedon the scale beams for engaging the bell crank levers to release thesupple- 10 mental valves and permit them to swing to closed positions.

In testimony whereof, I afliX my signature, in presence of twowitnesses.

JOSIAH NIELD.

Witnesses:

It. S. C. CALDWELL, LAURA A. KELLEY.

Conies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

